Hi Gary,
I have a '04 Turbo with a K&N FIPK2 and a BOV installed. You can hear all sorts of things coming out of the engine compartment. The turbo will vibrate a little bit near idle, and it whistles at high RPM. That's what I get for taking the silencers and airbox out. Which exhaust do you have? I ran without a muffler for 6 weeks, which although entertaining, loud and performance enhancing, eliminated any notion of luxury. (I put it back on, I like having a conversation while driving.) I live nearby, so let me know if you want to go for a ride and see what it sounds like.
- AJ
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